Guard for shielding set-screws in pulleys



(No ModeL) s. WOODBURY. I GUARD FOR SHIELDING SET SCREWS IN PULLEYS.

No 315,204. Patented Apr. '7, 1885.

UNITED STATES PATENT OFFICE.

SETH WOODBURSQOF LYNN, MASSACHUSETTS.

GUARD FOR SHIELDING SET-SCREWS lN PULLEYS.

SPECIFICATION forming part of Letters Patent No. 315,204, dated April 7, 1885.

Application filed February 3, 1885. (No model.)

To all whom it may concern;

Be it known that I, SETH H. \VooDBURY, of Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented a Guard for Shielding Set-Screws in Pulleys, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to means for covering and shielding setscrews in pulleys, and thus preventing accidents and injury to the persons who work about the same.

The nature of the invention is fully described hereinafter, and specifically pointed out in the claims.

Referring to the drawings, Figure l represents a pulley and set-screw with my setscrew guard attached thereto. Fig. 2is a vertical cross-section made on dotted line .9000. Fig. 3 is a View of the guard or shield detached.

The pulley A, shaft B, and set-screw a are all constructed and combined together in the usual and customary way. The shield or guard H is preferably composed of two parts, as shown in Fig. 3. They may be composed of wood, paper, iron, or other obvious materials. The half 6 is provided with a small rib, 2, adapted to fit' into a corresponding groove, f, in one end of the half h, thus looking these two ends of the shield together while it is sprung round the hub of the pulley'or its central shaft, B, and fastened by the screw 4, as represented in Fig. 1.

Instead of the two parts, as described, the shield may, if desired, be made in one piece and sprung round the shaft. The central hole of the shaft is provided with a flexible bushing, 8, which yields slightly, thus allowing the shield to be sprung onto and accommodate itself to shafts of different sizes. The shield of course grips onto the shaft or hub of the pulley, and revolves with the same, and it may be removed at any time whenever it is desired to do so, either to get at the setsorew or for any other purpose.

What I claim, and desire by Letters Patent to secure, is

1. The combination of a pulley, asetscrew, and a set-screw guard or shield, said guard or shield being adapted to conceal the setscrew, substantially as shown, and being detachabl y connected to the pulley, substantially as and for the purposes described.

2. A set-screw guard or shield composed of a flanged disk or shell having a central opening provided with a yielding or flexible bush- SETH H. XVOODBURY.

Witnesses:

C. B. TUTTLE, Q. TUTTLE. 

